JPS56143875A - Negative pressure responsive valve - Google Patents
Negative pressure responsive valveInfo
- Publication number
- JPS56143875A JPS56143875A JP4784980A JP4784980A JPS56143875A JP S56143875 A JPS56143875 A JP S56143875A JP 4784980 A JP4784980 A JP 4784980A JP 4784980 A JP4784980 A JP 4784980A JP S56143875 A JPS56143875 A JP S56143875A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- valve
- chamber
- pressure
- opened
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Safety Valves (AREA)
Abstract
PURPOSE: To provide a small-sized negative pressure responsive valve which may be stored in a small space by a method wherein a fluid flow passage is made to be opened when a pressure is found in the valve higher than a specified negative pressure and also higher than a specified rate of variation of the negative pressure.
CONSTITUTION: When a negative pressure higher than a first predetermined value is fed from a signal port 29 to the chambers 24, 27, the first pressure plate 14 is displaced in a leftward direction while the negative pressure is applied to the chamber 24, the shoulder part of the annular plate 15 is abutted against the valve 34, the valve 34 is opened to communicate with the surrounding air passage and the the passage is communicated with the output port 36. In the same manner, the valve 34 is opened due to a negative pressure in the chamber 27 and delayed due to an orifice 40, thereby a negative pressure in the chamber 27 and delayed due to an orifice 40, thereby a negative pressure in the chamber 26 is increased and finally returned back to the original position. When a rate of variation of the negative pressure in the chamber 27 is exceeded over a predetermined value, the valve 34 is released to open through a leftward displacement of the second pressure plate 17. In this way, it is possible small-sized negative pressure responsive valve which may be installed in a narrow space.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4784980A JPS56143875A (en) | 1980-04-10 | 1980-04-10 | Negative pressure responsive valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4784980A JPS56143875A (en) | 1980-04-10 | 1980-04-10 | Negative pressure responsive valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56143875A true JPS56143875A (en) | 1981-11-09 |
JPS6230347B2 JPS6230347B2 (en) | 1987-07-01 |
Family
ID=12786807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4784980A Granted JPS56143875A (en) | 1980-04-10 | 1980-04-10 | Negative pressure responsive valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56143875A (en) |
-
1980
- 1980-04-10 JP JP4784980A patent/JPS56143875A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6230347B2 (en) | 1987-07-01 |
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